Aly Song / Reuters
For years, the Brazilian city has surpassed international limits for a dangerous air pollutant.
MONEY SHARMA via Getty Images
Dirty air kills some 3 million people worldwide each year.
Notwithstanding the social media outrage faced by the Delhi government for coming up with the odd-even plan to curb pollution in India's capital, the authorities are bracing for the impending confusio...
Ever wondered about how your town or travel destination's air quality might affect your health? Here'